Machine foe grindim



3 SheetsSheet 1 (No Model.)

Patented Dec. 13,1 881.

\x X s I A N. PEYERS. Pnolo-Lrlhcgmplmn Washing'on. 0. c.

(No Model.) I 3 Sheets-Sheet 2.

L. P. VALIQUET. MACHINE FOR GRINDING SPEOTAG LE GL ASSES.

No. 250,691. Patented Dec. 13,1881.

(No Model.) 3 Sheets-Sheet 3.

L. P. VALIQUET. MACHINE FOR GRINDING SPEGTAGLE GLASSES. No. 250,691.Pajtented Dec. 13,1881.

' UNITED STATES PATENT OFFICE.

LOUIS P. VALIQUET, OF ROCHESTER, NEW YORK, ASSIGNOR TO HIMSELF ANDCHARLES J. ROBINSON, OF SAME PLACE.

MACHINE FOR GRIND ING SPECTACLE-GLASSES.

SPECIFICATION forming part of Letters Patent No. 250,691, dated December13, 1881.

Application filed July 13, 1881.

To all whom it may concern:

Be it known that I, LOUIS P. VALIQUET, of the city of Rochester, in thecounty of Monroe and State of New York, have invented an ImprovedMachine for Grinding Spectacle- Glasses, of which the following is aspecification, reference being had to the accompanying drawings.

My invention relates to an improved machine for grinding the edges ofspectacle-glasses to an oval form, which machine is fully described inthe following specification, and the novel features thereof pointed outin the claims.

My improved machine for grinding spectaole-glasses is represented in theaccompanying drawings, in which Figure l is a plan view. Fig. 2 is aside elevation. Fig. 3 is a front elevation. Figs. 4 and 5 arerespectively top and side views of the holder. Fig. 6 represents theinner end of the holder, as seen from above, with a glass clamped inposition to be ground. Fig. 7 is a plan view of the reciprocatingcam-bar which moves the carriage. Fig. Sis a side elevation of the same.Fig. 9 is a sectional diagram representing the operation of the stonesin grinding the bevels on the glasses. Fig. 10 is a side elevation ofthe swingingframe carrying the glass and form.

In the accompanying drawings, A is the frame of my improved machine forgrinding spectacle-glasses, which is provided with suitable legs, B B B,and supports the standards E F F, carrying the shafts D D of thegrindstones 0 O. The frame may be of any suitable shape, and it shouldbe of a size proportioned to that of the stones which it is designed toemployin the machine. From the front side of the frame a plate, U,projects outward and affords support for the traveling carriage H, towhich the swinging frame I, carrying the glass cand former l, isattached. The carriage H is mounted on a slide, so that it may beadjusted to and from the grindingstones, and also, if desired,transversely thereto, as hereinafter more fully pointed out.

In order to adapt them to be fitted into their frames, spectacle-glassesmust be ground on their edges to an oval form, and their edges must bebeveled from each side, as represented in Fig. 6 of the drawings, at anangle of about forty-five degrees.

(No model.)

In order to grind the bevels on the edges of the glass, I employ twogrinding-stones, O 0, arranged relatively to each other at the desiredangle, and to produce the oval form I support the glasses in a suitableclamp or holder attached to the upper end of the swinging frame I, themotion of which is controlled by an oval rotary former, 1, Figs. 2 and10. The grinding-stones (J O are mounted on the shafts D D, beingsecured thereto by the nuts and washers d 6?, so that they can beadjusted lengthwise thereon, for the purpose of compensating for thereduction of the diameter of the stones resulting from use. The shafts DD are supported at their rear ends by the journal-boxes a a, pivoted ata, so as to swing horizontally on a suitable plate on the upper end ofthe standard E. The forward ends of the shafts D D revolve in theirjournal-boxes b b on the upper ends of the standards F F, which areattached at their lower ends to the frame A by means of slotted flangesand bolts 0 0, so that they may be adjusted to and from each other tovary the angle between the shafts, as represented by the dotted lines DD in Fig. 1.

By means of the pivoted boxes at a. and the movable standards F F thestones 0 C may be set at such angles with each other as to produce anydesired bevels on the edges of the glasses. The shafts D D receive alongitudinal sliding movement through their journalboxes to prevent thegrooving of the stones 0 C by grinding at one place only in thefollowing manner: The shaft M of the machine, to which motion isimparted by a belt running over the pulley M is supported from the frameA by the journals N and a, and is provided with a worm, to, Fig. 1,meshing with the wormgears 0 O and communicating motion thereto. Thejournals N and o are supported from the frame A by the arms h h, Fig. 2.The rotary movement of the worm-gears 0 O, which revolve on studsattached to the frame, is communicated to the shafts D D, so as to givethem a reciprocating movement through their journalboxes, by means ofthe pitmen P P, levers Q Q, and boxes j j on the outer ends 'of theshafts. The inner ends of the pitmen are attached to cranks m m on thelower sides of the wormgears O O, and their outer ends are connected tothelower ends of thelevers Q Q, pivoted near the center of their lengthin the jaws la extending outward from the standard F F. The boxes jj arefitted on a reduced portion of the shafts D D, so that theirreciprocating motion is transferred to the shafts. By this arrangementit will be perceived that the motion of the cranks m m attached to theworm-gears O O imparts to the shafts D D a reciprocatin g end-playthrough theirjournal-boxes, thereby shifting the grindstones O O, asrepresented by the dotted lines in Fig. 1 and at G 0' in Fig. 9, so asto bring all parts of their grinding-surfaces successively intooperation on the spectacle-glasses, thereby preventing the grooving ofthe face of the stones.

The connection between the upper ends of the levers Q Q and the boxes jjmay be made by a pin and slot or by any usual form of sliding joint.

The carriage H, which supports the swinging frame I and the roller 0,against which the former l bears, is arranged on a slide, 1, so that itcan be adjusted to and from the stones by the handle q. The slide 1' isprovided on its lower side with the transverse slide R, which isarranged to be adjusted in the supporting-plate S by means of the screwand handle 70', by turning which the carriage H and swinging arm I maybe shifted laterally with reference to the grinding-stones. Thesupporting-plate S is also arranged to be adjusted transversely,beingprovided with a slide fitted to the plate T secured to the frame of themachine.

Through the plate T and underneath the slide of the supporting-plate Sis placed the reciprocating cam-bar V, which is moved backward andforward by the connection X, which is attached at one end to theeccentric 0 on the worm-gear O, and at the other to the cam-bar by thestud L, which .projects downward through a slot in the plate U of theframe. A cam-groove, h, is formed in the cam-bar V, (see Fig. 7,) intowhich a pin, 73, projects downward from the lower surface of the slideS. The pin '5' may, if desired, be provided with a friction-roller. Asthe cam-bar V reciprocates backward and forward the cam-groove h,operating on the pin z", causes the slide S to reciprocate a shortdistance across the machine, as represented by the dotted lines in Fig.1, so as to apply the glass 0 first on one of the grinding-stones andthen on the other, by which means the edges of the glass are ground onthe proper bevel. It should be understood, however, that the machinewill operate without the employment of the reciprocating cam-bar V andthe auxiliary slide S and T, the stones 0 0 being so arranged withreference to each other that one of them is traveling along in contactwith the edge of the glass while the other is executing that part of itsjourney in which it does not come in contact with the glass, asrepresented in the sectional diagram, Fig. 9. In that diagram the stone0 is represented as op erating on the edge of the glass a, grinding abevel on one side of the edge thereof while the stone 0 has traveledaway from the edge. When the stone 0 returns to the position representedby the dotted lines 0 it will produce a bevel on the opposite edge ofthe glass,while the stone 0 occupies approximately the position 0'.

The swinging frame 1 consists of two parallel bars, between which thegears e e e 6' revolve on suitable transverse shafts, which bars areconnected together at their lower ends and arranged to swing freely onthe rod 9 between the lugsff on the upper side of the carriage H. Theweight of the swinging frame serves to press the glass against thestones; or, if desired, a spring may be used to increase the pressure,or it may be diminished by counterbalancing the frame by a weightattached to an arm extending outward therefrom. The glass to be groundis attached to the upper end of the swinging frame by the holder J, andan arm, y, Fig. 10, projecting inward from the frame, supports therotary former l, by which the swinging motion of the frame iscontrolled. The former and the glass revolve at the same speed, beingconnected together by the train of gearing c e e e v. The former is madeof a shape similar to that to which it is desired to grind thespectacle-glasses, and smaller in proportion to the length of the arm.Formers of different sizes and shapes may be employed to adapt themachine to grinding all desired sizes and shapes of spectacle-glasses.The former 1 runs against a roller, 0, carried by an arm, H, projectingupward from the slide U on the upper side of the carriage H. The slide Uis dovetailed or otherwise secured to the carriage so that it may beadjusted thereon by the handwheel and screw g. The inclination of theswinging frame with reference to the horizontal line and the point ofcontact of the glass on the grindstones may be altered by shifting theposition of the slide longitudinally on the car-v riage H.

The holder J consists of two metallic bars or plates provided at theirinner end with studs 2 z, on which the pinion 0 and the clamps r 1",provided with the rubber disks 8 s revolve. The glass, while beingground, is held between the disks 8 s, which are pressed toward eachother by the side plates forming the holder J. The glass is insertedbetween the disks by springing the side plates apart, which close up onit and produce sufficient friction upon the rubber disks to hold it inplace. The lower sides of 'the holder are provided with hook-notches 0",which engage with the shaftof the gear 0' or with studs inserted in theframe J. The outer end of the holder is supported by the spring-arm D,which rises upward from the frame I. A pin, 2, passes through the holderand the upper end of the spring-arm.

In applying the holder to the frame I the notches 0 are engaged with theshaft of the gear 0', the outer end of the holder being engaged with theupper end of the spring-arm D by the elasticity of which the notches 0"are held in place on the shaft. A number of holders may be provided foreach machine, so that a glass may be placed in the clamps (by the use ofany suitable guide) of one holder, while another glass is on the machinebeing ground, thereby obviating loss of time. The

operation of changing the holders requires but a few seconds time.

The train of gearing which rotates the glass and the former is drivenfrom the shaft M by the pulley q, belt a, pulley m, roller Y, belt- 1,pulley Z, and gears K and L. The roller Y is carried by a shaftsupported in journals in an arm, 1', attached to the frame A. The rolleris made sufficiently long to permit of the shifting of the belt Ithereon as the carriage H is adjusted to and from the stones- Therollershaft extends inward and carries the pulleym over which the belt aruns. The pulley Z and the gear K revolve together on the outer end ofthe shaft 9, transmitting motion to the gear L, which is fast on thetransverse shaft passing through the frame I, on which the gear 6 issecured. As the frame swings about the rod 9 it is evident that thegears K and L will always remain in mesh with each other, whateverposition the frame may assume. The motion of the gear-wheel e istransmitted to the former l and the glass 0 by the train of gears e e e,the last of which meshes with the pinion e attached to the holder whenthe latter is placed in position on the swinging frame.

Motion is imparted to the grinding-stones G 3 8y the belts B B runningover the pulleys It is obvious that the number of gears employed in theswinging frame I is entirely immaterial. I prefer to run the glass andthe grinding-stones in opposite directions, as represented in Fig. 2.

The arm H, which carries the roller 0, against which the former l rests,may be made extensible, so that the vertical position of the roller 0may be varied to adapt the machine to grinding different forms of ovals.

I claim- 1. The combination of the grinding-stones O 0, arranged at anangle with each other, the swinging frame I, rotary former l, theglass-holder J, roller 0, and gearing connecting the former and theholder, substantially as described.

2. The glass-holder J, provided with the rotary clamps r 1", and thehooked notches 0, substantially as described.

3. In combination with mechanism, substantially as described, forpresentingthe glass to the stones, the grinding-stonesU 0 arranged at anangle with each other on shafts D D, provided with means for relativeadjustment to vary the angle, substantially as and for the purposes setforth.

4. In combination with mechanism, substantially as described, forpresenting the glass to the stones, the grindstones G 0, arranged at anangle with each other on the threaded shafts D D, provided with meansfor adjusting the stones longitudinally thereon, substantially as andfor the purposes set forth.

5. The combination and arrangement of the frame A,standards E F F,shafts D D, stones 0 O, carriage H, swinging frame I, and glassholder J,substantially as described.

6. The combination, with the angularly-arranged stones 0 O, of theswinging frame I, former l, gearing e c e e 6", glass-holder J, roller0, slide U, and carriage H, substantially as described.

7. In combination with the angularly-arranged stones 0 O, the swingingframe I, provided with a suitable glass-holding clamp, former, andconnecting-gearing, the supportin g-roller 0, arranged to be adjusted toand from the stones and transversely thereto. substantially asdescribed.

8. The combination, with the angularly-arranged stones 0 O, of theswinging frame I, provided with a suitable former and a glassclamp, andconnecting-gearing, the roller 0, carriage H, and slide S T, having pinand cam-bar V, substantially as described.

9. Thecombination, with the swinging frame I, provided with the formerl, and a suitable glass-clamp and connectinggearing, and the roller 0,of the grinding-stones G 0, arranged at an angle with each other andmounted on shafts D D, having end-play through their journals,substantially as described.

10. The rotary grinding-stones (J C, arranged at an angle with eachother, and capable of an alternating reciprocating motion lengthwise oftheir shafts, in combination with means for imparting such motion,substan tially as and for the purposes set forth.

LOUIS P. VALIQUET.

Witnesses GEo. B. SELDEN,

CHARLES J. ROBINSON.

